The frame uses a box-type pre-stressed structure with a rigidity coefficient of 4.5×10⁶N/mm,capable of withstanding repeated impact loads.The upper and lower roll sets are independently driven by hardened gear reducers(torque reserve factor 2.5)and universal joints,with a synchronization accuracy≤0.1°.The roll bodies are fitted with replaceable wear-resistant liners(hardness HRC55-58)with a service life up to 8,000 hours.The four-column guiding mechanism uses copper-based graphite-lubricated bushings with guide clearance≤0.08mm.A digital angle sensor monitors the web tilt in real-time,and the PLC automatically calculates the correction amount.The hydraulic system includes an accumulator for pressure maintenance,with pressure fluctuation≤±0.5MPa.Three operating modes are available:automatic straightening,manual fine-tuning,and expert database recall,capable of storing process parameters for 50 common section specifications.
Specific parameters:Straightening roll diameterΦ480mm,effective roll face length 450mm,adjacent roll center distance 650mm.Main reducer ratio i=48,output shaft rated torque 12kN·m.Hydraulic cylinder stroke 200mm,working pressure 25MPa,piston rod surface hard chrome plated(thickness 0.15mm).Motors feature winding temperature control protection,insulation class F.Foundation installation requires flatness≤0.2/1000,embedded plate thickness≥40mm.Electrical cabinet protection rating IP54,equipped with RS485 interface for data collection.Overall machine noise≤82dB unloaded,≤85dB under load.Total peak power consumption 185kW,recommended power supply capacity 250kVA.Operating environment:ambient temperature-10°C to 45°C,free from conductive dust.
Mainly used for straightening heavy steel structures:correcting deformation of construction H-beams(Q345B)after welding,ensuring column/beam verticality≤H/1000;end straightening of segmented bridge box girders(Q370qD)during fabrication;flatness restoration of wind turbine tower flange rings(S355NL);pre-camber adjustment of port crane main girders(Q460C);and repair/refurbishment of mine support sections.In steel structure production lines,it is typically positioned after the assembly/welding station and before shot blasting/painting,serving as a key process equipment to ensure structural dimensions comply with the"Code for Acceptance of Construction Quality of Steel Structures"(GB50205).
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